Probably for maintenance. Don't use the machine for anything you don't want others to see or know about.
– Thorbjørn Ravn AndersenFeb 10 at 10:44

In addition to the other reasons, backup. In an organization with hundreds of computers, that computers can magically transform themselves into bricks/doorstops is a far too regular occurrence for IT.
– David HammenFeb 10 at 11:52

3 Answers
3

It is so that support can access your computer without needing to sign in on your profile. They may need to do this for any number of reasons, troubleshooting, software installation, updating etc,.

It's routine in many networks, particularly those where normal users do not have full admin rights to their machines. But a good idea even when they do, user profiles can become corrupted creating issues signing in and a host of other potential problems which can much more easily be fixed if there is an existing local profile which can be used.

To add to this, It could also be the account used to setup the computer which will have full admin access rights. If you are a local user, it can show you all possible accounts on the computer.
– ShadowzeeFeb 10 at 22:44